diff --git a/config/sample-macros.cfg b/config/sample-macros.cfg
index 0eb049ac..fcb144e0 100644
--- a/config/sample-macros.cfg
+++ b/config/sample-macros.cfg
@@ -72,9 +72,7 @@ value: 0
 shutdown_value: 0
 #   Disable at emergency shutdown (no PWM would be available anyway).
 cycle_time: 0.001
-#   PWM frequency : 0.001 = 1ms will give a base tone of 1kHz
-scale: 1000
-#   PWM parameter will be in the range of (0-1000 Hz).
+#   Default PWM frequency : 0.001 = 1ms will give a tone of 1kHz
 #   Although not pitch perfect.
 
 [gcode_macro M300]
@@ -83,7 +81,7 @@ gcode:
     {% set S = params.S|default(1000)|int %}
     # Use a 10ms duration is P is omitted.
     {% set P = params.P|default(100)|int %}
-    SET_PIN PIN=BEEPER_pin VALUE={S}
+    SET_PIN PIN=BEEPER_pin VALUE=0.5 CYCLE_TIME={ 1.0/S if S > 0 else 1 }
     G4 P{P}
     SET_PIN PIN=BEEPER_pin VALUE=0